first commit

handlers/ws.go

@@ -0,0 +1,47 @@
+package handlers
+
+import (
+	"log"
+	"net/http"
+
+	"aroll/ws"
+
+	gws "github.com/gorilla/websocket"
+)
+
+var upgrader = gws.Upgrader{
+	ReadBufferSize:  1024,
+	WriteBufferSize: 4096,
+	CheckOrigin:     func(r *http.Request) bool { return true },
+}
+
+func WSHandler(hub *ws.Hub) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		conn, err := upgrader.Upgrade(w, r, nil)
+		if err != nil {
+			log.Printf("ws upgrade: %v", err)
+			return
+		}
+
+		client := &ws.Client{Send: make(chan []byte, 256)}
+		hub.Register <- client
+
+		// Writer goroutine: pumps messages from hub → WebSocket
+		go func() {
+			defer conn.Close()
+			for msg := range client.Send {
+				if err := conn.WriteMessage(gws.TextMessage, msg); err != nil {
+					return
+				}
+			}
+		}()
+
+		// Reader loop: keeps the connection alive and detects close frames
+		for {
+			if _, _, err := conn.ReadMessage(); err != nil {
+				break
+			}
+		}
+		hub.Unregister <- client
+	}
+}